public class Student {
    private String name;
    private int age;
  
    public Student() {
    }
  
    public Student(String name, int age) {
      this.name = name;
      this.age = age;
    }
    public Student(String zhangsan, int i, String 男) {
    }
  
    // 重写toSting方法
    @Override
    public String toString() {
      return "Student{name:" + name + ",age:" + age + "}";
    }
  }